Operation & Installation Manual
SENTRY™ 1510
Section 3: Installation
11984 Rev 01 Page 1 of 15
3.1 Installation
Remove the SENTRY 1500 (When Applicable)
Before beginning work, shut down all furnace operations. Turn off the SENTRY
Supervisor power switch. If possible, turn off the nitrogen to the SENTRY 1500,
and isolate the SENTRY 1500 from house exhaust. Perform the following:
1. Disconnect the nitrogen supply (typically hard plumbed) from the Swagelok
fitting on the outlet side of the SENTRY 1500.
2. Disconnect the sense line (typically a flexible tube) from the barbed fitting on
the outlet side of the SENTRY 1500.
3. Disconnect the cable from the SENTRY Supervisor to the SENTRY 1500.
4. Disconnect the flange fittings from the inlet and outlet of the controller.
5. Remove the SENTRY 1500 by removing the two mounting bolts in the middle
of the controller body. (For more information on how the SENTRY 1500 is
installed, see “The SENTRY Model 1500 Installation Manual”.
General Installation Requirements
The direction of flow on the SENTRY 1510 is indicated by an arrow in the white
Teflon portion of the controller. The arrow head must be installed pointing toward
house exhaust (and away from the process chamber). The Supervisor and the
SENTRY 1510 exhaust controller need to be mounted securely either on or in
close proximity to the diffusion furnace. The relative distance between the
Supervisor, the SENTRY 1510 and the furnace is determined by the manufactured
length of the electrical cable interconnects, and the length of the process pressure
sense tube. (See Appendix A for cable lengths.) The process pressure transducer
is located in the controller, is calibrated to a process sense tube length of 10 ± 5
feet. This length establishes the distance between the SENTRY 1510 and the
point on the furnace where the process pressure is to be measured. The length of
the sense tube can be increased, or decreased as long as the transducer is
recalibrated (see section 5, page 2.) The installation should be planned to allow
for ease of cable routing and ease of access to the Supervisor and the SENTRY
1510.
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